const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}
const ymd = date => {

  const month = date.getMonth() + 1
  const day = date.getDate()

  return `${[month, day].map(formatNumber).join('/')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}
function saveRecently(newObj) {
  const arr = wx.getStorageSync('recently') || [];
  const index = arr.findIndex(item =>
    Object.keys(newObj).every(key => newObj[key] === item[key])
  );
  if (index === -1) {
    arr.unshift(newObj);
  } else {
    if (index != 0) {
      arr.splice(index, 1);
      arr.unshift(newObj);
    }
  }
  if (arr.length > 4) {
    arr.pop();
  }
  wx.setStorageSync('recently', arr)
}

module.exports = {
  ymd,
  formatTime
}
